To talk live over tracks in PlayIt Live, you have two main options. First, you can use an external mixer by connecting your microphone to the mixer, routing PlayIt Live's output to the mixer, and controlling both with the mixer's faders. Alternatively, you can use the Microphone Mix plugin (https://www.playitsoftware.com/Plugins/View/MicrophoneMix) which allows you to connect a USB microphone directly to your computer and mix it with PlayIt Live's output. The plugin allows ducking: lowering music when the microphone is active. This is different from the Voice Tracking module, which is for pre-recording voice segments between songs rather than live broadcasting.